The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 19, 1992
Filed:
Mar. 08, 1989
Applicant:
Inventor:
Gary E Hewett, Milpitas, CA (US);
Assignee:
Cholestech Corporation, Hayward, CA (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C12M / ; C12M / ; G01N / ;
U.S. Cl.
CPC ...
435288 ; 435289 ; 435291 ; 435808 ; 435 11 ; 435 25 ; 435 28 ; 435 19 ; 435 15 ; 422 56 ; 422 58 ; 422 8205 ; 422 8209 ; 422100 ; 436165 ;
Abstract
Method and apparatus for use in determining the concentration of a selected analyte in a body-fluid sample. As the fluid sample is applied to a wettable, absorbent reaction pad, the extent of sample wetting of the pad is monitored by surface reflectance. This surface monitoring is used to control the volume of sample applied to the pad, to prevent overfilling the pad and to allow determination of the final sample volume applied. From the known sample volume and amount of analyte, the concentration of analyte in the sample can be accurately calculated in reaction components, trapping agents, matrix configuration, and analyte tested can be made.